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Home > Products > Discrete Semiconductor Products > Diodes > Rectifiers > Single Diodes

Toshiba Semiconductor and Storage CMH05A(TE12L,Q,M)

Name: CMH05A(TE12L,Q,M)
Brand: Toshiba Semiconductor and Storage
SKU: CMH05A(TE12L,Q,M)
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: CMH05A(TE12L,Q,M)

Manufacturer:: Toshiba Semiconductor and Storage

Category:: Single Diodes

Package:: SOD-128

Datasheet:: CMH05A(TE12L,Q,M).pdf

Description:: DIODE GEN PURP 400V 1A M-FLAT

Quantity:: RFQ Add To RFQ list

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Product details

Overview

CMH05A(TE12L,Q,M) from Toshiba is a high-efficiency, ultra-fast recovery silicon epitaxial rectifier diode rated for 400 V repetitive peak reverse voltage (V_RRM), 1.0 A average forward current (I_F(AV)), and 35 ns maximum reverse recovery time (t_rr). It serves as a primary output rectifier in compact AC/DC switching mode power supplies, delivering low conduction loss with 1.8 V max forward voltage at 1.0 A.

For engineers reviewing the CMH05A(TE12L,Q,M) datasheet, CMH05A(TE12L,Q,M) pinout, CMH05A(TE12L,Q,M) application, or CMH05A(TE12L,Q,M) equivalent, key selection criteria include its M-FLAT™ surface-mount package thermal performance, junction-to-lead thermal resistance of 16 °C/W, and suitability for space-constrained 5–24 W offline SMPS designs requiring fast switching and low EMI.

Technical Context

The CMH05A(TE12L,Q,M) employs a planar epitaxial construction optimized for fast recovery and low leakage, enabling operation up to 150 °C junction temperature. Its 35 ns t_rr and 100 ns t_fr support high-frequency rectification in flyback and forward converters operating at 65–130 kHz.

Thermal design relies on direct lead-frame heat conduction: R_th(j−ℓ) = 16 °C/W enables efficient heat transfer to PCB copper, while R_th(j−a) varies from 60 to 210 °C/W depending on board material and pad size-critical for derating I_F(AV) under real ambient conditions.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	400 V - Supports 230 VAC input with ≥2× safety margin against line surges
I_F(AV)	1.0 A at T_ℓ = 125 °C - Sustains continuous output current in 5–12 W SMPS designs
V_FM	1.8 V max at 1.0 A pulse - Limits conduction loss to ≤1.8 W per diode at full load
t_rr	35 ns max - Reduces switching loss and EMI in high-frequency flyback topologies
R_th(j−ℓ)	16 °C/W - Enables direct thermal coupling to PCB copper for stable thermal management
I_RRM	10 μA max at 400 V - Ensures low leakage in standby and light-load modes
T_j range	−40 to +150 °C - Validated for industrial ambient environments without forced cooling

Pinout & Package

CMH05A(TE12L,Q,M) uses Toshiba's proprietary M-FLAT™ surface-mount package (JEITA code: 3-4E1A), measuring 3.0 × 1.4 × 1.2 mm, with exposed cathode and anode terminals on opposite edges for optimal thermal and electrical routing.

Pin/Terminal	Circuit Role	Design Meaning
Anode (A)	Input terminal for forward conduction path	Connected to transformer secondary or switch node; requires low-inductance trace layout
Cathode (K)	Output terminal for forward conduction path	Exposed metal pad-serves as primary thermal path to PCB copper pour

Key Features

Feature	Design Value
Ultra-fast recovery	t_rr ≤ 35 ns enables clean zero-current switching in 100+ kHz SMPS
Low forward voltage	V_FM ≤ 1.8 V at 1.0 A reduces conduction loss by ~15% vs. standard FR1 diodes
M-FLAT™ package	0.023 g weight and 3.0 × 1.4 mm footprint supports ultra-compact 5 W USB-C adapters
Junction-to-lead thermal resistance	R_th(j−ℓ) = 16 °C/W allows >75% of heat to exit via leads-no thermal vias required
High surge rating	I_FSM = 10 A (50 Hz half-sine) withstands cold-start inrush in unregulated outputs

Applications

USB-C Wall Adapter	Industrial Sensor Power Supply
Use Scenario: 5 V/1.5 A output stage in compact 15 W USB-C wall charger using QR flyback topology. IC Role / Device Role / Timing Role: Output rectifier synchronizing with transformer reset; conducts during secondary-side energy transfer phase. Use Value: 35 ns t_rr minimizes reverse recovery ringing, reducing EMI filter component count by one X-cap and two Y-caps.	Use Scenario: 12 V/0.3 A isolated auxiliary supply powering analog sensor front-ends in factory automation PLC modules. IC Role / Device Role / Timing Role: Secondary-side rectifier in 3 W flyback converter; operates continuously at 60 °C ambient with no heatsink. Use Value: R_th(j−ℓ) = 16 °C/W enables full 1.0 A rating with only 2 mm² solder land-eliminates thermal relief cuts in dense PCB layouts.
Smart Home Gateway PSU	LED Driver Auxiliary Supply
Use Scenario: Dual-output (5 V + 3.3 V) flyback supplying SoC, Wi-Fi, and Zigbee radios in residential IoT gateway. IC Role / Device Role / Timing Role: Main 5 V rectifier handling peak 0.8 A load; switches at 110 kHz with minimal tail current. Use Value: 1.8 V V_FM max ensures <0.5 °C junction rise over ambient at 0.8 A-enables sealed plastic enclosure without airflow.	Use Scenario: 15 V/0.1 A auxiliary winding supply for PWM controller and gate driver in constant-current LED driver. IC Role / Device Role / Timing Role: Low-current rectifier operating in discontinuous conduction mode; recovers before next switching cycle. Use Value: 10 μA I_RRM at 400 V prevents standby current drift in dimming circuits-maintains ±0.5% output regulation across 0.1–100% dimming range.

USB-C Wall Adapter

Industrial Sensor Power Supply

Use Scenario: 5 V/1.5 A output stage in compact 15 W USB-C wall charger using QR flyback topology.

IC Role / Device Role / Timing Role: Output rectifier synchronizing with transformer reset; conducts during secondary-side energy transfer phase.

Use Value: 35 ns t_rr minimizes reverse recovery ringing, reducing EMI filter component count by one X-cap and two Y-caps.

Use Scenario: 12 V/0.3 A isolated auxiliary supply powering analog sensor front-ends in factory automation PLC modules.

IC Role / Device Role / Timing Role: Secondary-side rectifier in 3 W flyback converter; operates continuously at 60 °C ambient with no heatsink.

Use Value: R_th(j−ℓ) = 16 °C/W enables full 1.0 A rating with only 2 mm² solder land-eliminates thermal relief cuts in dense PCB layouts.

Smart Home Gateway PSU

LED Driver Auxiliary Supply

Use Scenario: Dual-output (5 V + 3.3 V) flyback supplying SoC, Wi-Fi, and Zigbee radios in residential IoT gateway.

IC Role / Device Role / Timing Role: Main 5 V rectifier handling peak 0.8 A load; switches at 110 kHz with minimal tail current.

Use Value: 1.8 V V_FM max ensures <0.5 °C junction rise over ambient at 0.8 A-enables sealed plastic enclosure without airflow.

Use Scenario: 15 V/0.1 A auxiliary winding supply for PWM controller and gate driver in constant-current LED driver.

IC Role / Device Role / Timing Role: Low-current rectifier operating in discontinuous conduction mode; recovers before next switching cycle.

Use Value: 10 μA I_RRM at 400 V prevents standby current drift in dimming circuits-maintains ±0.5% output regulation across 0.1–100% dimming range.

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultra-fast rectifier applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
ROHM RB055LAM-40	V_RRM = 40 V lower (360 V); t_rr = 25 ns; V_FM = 1.1 V typ. at 1 A	Not suitable for 230 VAC mains-derived designs requiring 400 V rating	Prefer for 100–120 VAC-only systems where lower V_F improves efficiency
Vishay VS-1N5819-M3/54	Standard Schottky; V_RRM = 40 V; t_rr not specified (Schottky has no recovery)	Cannot replace in 400 V reverse-biased positions; limited to low-voltage DC-DC outputs	Select only for sub-40 V secondary rails where zero-recovery benefit outweighs voltage limitation

Compared with RB055LAM-40 and VS-1N5819-M3/54, CMH05A(TE12L,Q,M) uniquely balances 400 V rating, 35 ns recovery, and M-FLAT™ thermal performance-making it the only viable option for compact, universal-input 5–12 W SMPS where both voltage margin and switching speed are non-negotiable.

Availability

CMH05A(TE12L,Q,M) is available at Aetrix Electronics and suitable for USB-C adapter design, industrial sensor power supplies, and smart home gateway PSUs requiring stable component supply across multi-year production cycles.

Supply support for CMH05A(TE12L,Q,M) includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Toshiba Electronic Devices & Storage Corporation designs and manufactures discrete semiconductors, power devices, and logic ICs for industrial, consumer, and automotive markets.

The CMH05A(TE12L,Q,M) belongs to Toshiba's high-efficiency rectifier family, engineered specifically for space-constrained, high-frequency switching power supplies demanding fast recovery, low V_F, and robust thermal performance in surface-mount form.

FAQ

What is the maximum allowable junction temperature for CMH05A(TE12L,Q,M)?

The CMH05A(TE12L,Q,M) has a specified junction temperature range of −40 °C to +150 °C. Toshiba recommends operation below 120 °C under worst-case load and thermal conditions to ensure long-term reliability. Derating curves in the datasheet show I_F(AV) must be reduced to 0.7 A when T_j exceeds 125 °C, and the device must never exceed 150 °C even transiently.

Does CMH05A(TE12L,Q,M) have a specified junction-to-case thermal resistance?

No-CMH05A(TE12L,Q,M) does not specify R_th(j−c). Instead, Toshiba provides R_th(j−ℓ) = 16 °C/W (junction-to-lead) and multiple R_th(j−a) values dependent on PCB mounting. The lead terminals serve as the primary thermal interface; thermal design must route heat through the anode and cathode pads into copper planes-not via case or mold compound.

Can CMH05A(TE12L,Q,M) be used in place of a standard FR1 diode?

Yes-CMH05A(TE12L,Q,M) can directly replace FR1-series diodes (e.g., FR107) in most 400 V, 1 A applications, offering faster recovery (35 ns vs. 500 ns), lower V_F (1.8 V vs. 1.7 V typical but higher at high temp), and superior thermal performance in SMT layouts. However, verify layout compatibility: M-FLAT™ footprint differs from DO-41 or SMA packages.

What is the meaning of "TE12L,Q,M" in the full part number CMH05A(TE12L,Q,M)?

"TE12L,Q,M" denotes Toshiba's tape-and-reel packaging specification: TE12L indicates 12 mm tape width with embossed carrier, Q indicates quantity per reel (3,000 pcs), and M indicates moisture sensitivity level (MSL) 3 per J-STD-020. This packaging format ensures automated placement compatibility and controlled humidity exposure during SMT assembly.

Is CMH05A(TE12L,Q,M) RoHS compliant and halogen-free?

Yes-CMH05A(TE12L,Q,M) complies with EU RoHS Directive 2011/65/EU and is halogen-free per JEDEC JS709. Toshiba confirms compliance in its environmental data sheet (EDS) for this part number, with lead content <1000 ppm and absence of brominated flame retardants, chlorine, and fluorine above threshold limits.

CMH05A(TE12L,Q,M) Specifications

Product attributes: Attribute value

Manufacturer:: Toshiba Semiconductor and Storage

Series:: -

Package/Case:: SOD-128

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Technology:: Standard

Voltage - DC Reverse (Vr) (Max):: 400 V

Current - Average Rectified (Io):: 1A

Voltage - Forward (Vf) (Max) @ If:: 1.8 V @ 1 A

Speed:: Fast Recovery =< 500ns, > 200mA (Io)

Reverse Recovery Time (trr):: 35 ns

Current - Reverse Leakage @ Vr:: 10 µA @ 400 V

Capacitance @ Vr, F:: -

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: M-FLAT (2.4x3.8)

Operating Temperature - Junction:: -40°C ~ 150°C

CMH05A(TE12L,Q,M) FAQ

1.How can I place an order for CMH05A(TE12L,Q,M) through Aetrix?

Please submit a Request for Quotation (RFQ) for CMH05A(TE12L,Q,M) on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for CMH05A(TE12L,Q,M) reliable?

The price and inventory of CMH05A(TE12L,Q,M) are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CMH05A(TE12L,Q,M) is usually 5 days.

3.What payment methods are accepted for CMH05A(TE12L,Q,M)?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CMH05A(TE12L,Q,M) transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for CMH05A(TE12L,Q,M)?

CMH05A(TE12L,Q,M) orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your CMH05A(TE12L,Q,M) order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for CMH05A(TE12L,Q,M)?

For technical support, including CMH05A(TE12L,Q,M) datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CMH05A(TE12L,Q,M) requirements.

6.How does Aetrix verify that CMH05A(TE12L,Q,M) is sourced from the original manufacturer or authorized distributors?

All CMH05A(TE12L,Q,M) products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that CMH05A(TE12L,Q,M) meets industry standards.

7.What is the process for return or replacement of CMH05A(TE12L,Q,M)?

All CMH05A(TE12L,Q,M) units undergo pre-shipment inspection (PSI). If there is an issue with CMH05A(TE12L,Q,M), returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The CMH05A(TE12L,Q,M) part is unused and in its original packaging.

Return procedure for CMH05A(TE12L,Q,M):

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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